Healthy patients in ASA class I and II awaiting elective abdominal laparoscopic surgery were included in the study. The participants were initially divided into two groups: the first group included patients with morbid obesity (BMI > 40), and the second group included patients with normal body weight (BMI < 25). All the patients inside the two groups were subsequently randomly and divided into etomidate and thiopental groups, according to the intravenous anesthetic used as the induction agent for general anesthesia. Finally, four groups of patients were analyzed: 1. obese, in which etomidate was used (OE group), 2. obese, in which thiopental was used (OT group), 3. patients with normal body mass, in which etomidate was used (NE group), and 4. patients with normal body mass, in which thiopental was used (NT group).